Pontilyfni
UK19920816_A16 August 1992·Pontilyfni
Reported 16 August 1992 at Pontilyfni. One archive recorded it, so nothing about it can be cross-checked.
The record
- date
- 16 August 1992 (day precision)
- place
- Pontilyfni
Wales - crop
- not recorded by any source
- size
- not recorded
- recorded by
- cc
- images
- 1 · 1 diagram
- writing
- nothing was written about this formation on any source
Also called
Nothing else. No other name or place string appears on any source record for this formation.
Where exactly
- coordinate
- 52.949337, -4.148712
- how it was got
- county centroid
county, to within 38,506 m, from the cc record - on a map
- OpenStreetMap
No source publishes a coordinate for any formation in this archive. Every coordinate here is derived from the place name a source printed, and this page says how precise that makes it rather than rounding it away.
Images
1 image(s) on this formation's own source records. Click a tile for the full image; the bytes are fetched when you ask for them and are not stored in this page.
Diagrams (1)
| site | kind | credit | basis | caption | size | file | source page |
|---|---|---|---|---|---|---|---|
| cc | diagram no diagram published by cropcirclecenter (plain circle placeholder) |
cropcirclecenter.com / Bertold Zugelder | site default | 575×415 32.4 KiB image/jpeg |
image c782665e5c68 | https://www.cropcirclecenter.com/date/1992/199208.html |
Date
16 August 1992, to day precision. What a source records is the day a formation was found and reported.
- reported by
- cc: 16 August 1992
- weekday
- Sunday, day 229 of the year, ISO week 33, summer
- sun and moon
- 37.3 days before the September equinox; moon waning gibbous (92% lit), 3.1 days after the full moon (computed at 12:00 UTC; a reported date is a discovery date, not a creation date)
Place
What each source printed, and the coordinate derived from it. No source in this archive publishes a coordinate of its own.
- coordinate
- 52.949337, -4.148712 — county, ±38,506 m, by county_centroid, from the cc record
- on a map
- OpenStreetMap
| site | place | county | country | grid ref | what3words | fix |
|---|---|---|---|---|---|---|
| cc | Gwynedd | Wales | 52.949337, -4.148712 county / county_centroid |
Crop and size
crop and size not recorded by any source
Source records
What each source published, side by side. A row whose values differ across the sources is marked: the archive prints the disagreement rather than choosing a winner.
| field | cc cropcirclecenter.com |
|---|---|
| id / slug | UK19920816_A |
| name | Pontilyfni |
| location | |
| county | Gwynedd |
| country | Wales |
| date reported | 1992-08-16 |
| date precision | day |
| crop | |
| size | |
| diameter (ft) | |
| grid reference | |
| what3words | |
| map link | |
| credits | cropcirclecenter.com / Bertold Zugelder |
| source page | https://www.cropcirclecenter.com/date/1992/199208.html |
| link to the entity | singleton decided by none on 2026-09-11 |
| warnings | no_formation_page |
| record | cc/d524696f17a96… raw record view: /formation/cc/d524696f17a9656c1ca34be566910de22af41e255f9aabc5fc22d9e49783cd28 in the preview app |
Texts
no text documents in the archive for this formation
Claims about this formation
no claim was extracted from a text about this formation
Geometry
1 diagram file(s) on this page, of which 1 is a shared cropcirclecenter placeholder rather than a drawing of this formation. measured from the diagram itself, and experimental: the extractor's rotational order is right on 88.8 % of a 200-diagram hand-labelled set against a gate of 90 %, so read a number here beside the picture rather than instead of it.
| diagram | rotational symmetry | elements | rings | mirror | fill |
|---|---|---|---|---|---|
| cc c782665e (placeholder: digest) | ≈ continuous (concentric circles) | 1 | 1 | 0.996 | 1.0049 |
Experimental, and marked ≈ wherever it appears. These numbers are read off a drawing, not off the field: the extractor's rotational order agrees with a hand-labelled set on 88.8 per cent of 200 diagrams against a gate of 90 per cent, its element count is within one on 97.5 per cent, and its ring count is not calibrated at all. Nothing in the analysis tree is derived from the rotational order while that gate is unmet.
Diagrams that look like these: cc c782665e— the nearest by perceptual hash. The whole archive is browsable by shape in the shape section, and this formation's own diagrams go straight into that grid: show them in the grid.
Neighbours
In time
- previous
- Strathclaire 15 August 1992, Strathclaire
- next
- Avebury 17 August 1992, Avebury
- previous in UK
- Milton Abbas 12 August 1992
- next in UK
- Avebury 17 August 1992
- same day
- Silbury Hill (Silbury Hill)
- within 7 days and 25 km
- none, or this formation has no coordinate at place confidence or better
In place
The nearest formations the archive can place.
this formation has no coordinate at place confidence or better, so nothing can be called near it
- same county and year
- none
Provenance
- entity built at
- 2026-09-11T19:20:39Z (derived from the link decisions, not from this build)
- index run ids
- none
- reviews applied
- none
- open queue pairs
- none
- entity record
- index/formations/UK19920816_A.json · row in index/manifest.jsonl
- input digests
- entity dc55abce9138 · images afe2570b1c43 · texts 4f53cda18c2b · geo 07b41f18a9b4